Emmanuelle Morgan liked one of my SFFPIT tweets back in December and I queried her then; she got back to me a couple weeks later with a form rejection. I know agents tend to prioritize queries requested from pitch parties, so I can't really speak to her usual response time frame.
I had also queried Alyssa Jennette with the same project a couple of months prior, and never got a response. I queried Madelyn Burt with a new project back in April, and she got back to me a couple of days ago with a rejection.